Abstract

Dynamic add–drop filters with variable bandwidth are demonstrated on microelectromechanical-system (MEMS)–actuated microdisk resonators for what is believed to be the first time. The tuning mechanism is based on a variable power coupling ratio that is controlled by varying the gap spacing between the waveguide and the microdisk through MEMS actuators. The results show wavelength switching with an extinction ratio of 20dB and a tunable bandwidth ranging from 12 to 27GHz. These dual functions were realized using the device with the operation voltage varying between 0 and 35V.

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